Okay, well, I have a powerpc 1.42ghz mac mini with 2 months warrenty left. The thing won't turn on. The first problem i was having was that it would only turn on from 30-40 seconds at a time. I would boot it up and it would load up to os/x, and at a random time it would shut off. I even tried to boot to different mac bootable disks with the same results, even Open firmware menu it would shut off within 30-40 seconds. I wasnt sure what was going on. Within the open firmware I reset the pRam and the NVram... still no luck. Later, i unplugged it for a while, plugged it in, I tried again... now It won't turn on. I have taken it apart looking for something obviously wrong on the logic board to find out I can't really find anything wrong... what's going on? Nothing seems burnt, fried... etc. The optical and hard drive is perfect, fan is great, everything seems normal as ever. I tried a friend's power supply with the same results. Does anyone have some suggestions? thanks. I was planning on using it for a car installation.